Biostar's service is handled by Abacus peripherals - I think the support network is quite good.
I have the TZ68A+ board, which is an earlier version of the TZ68K+. TZ68K+ is a revised version of this board with 8+1 power phases instead of 4+1 power phases on the TZ68A+ (other than this, the two boards are exactly the same). This revision was primarily made because the 4+1 phase design was limiting the overclocking - people were unable to go over 4.8-4.9GHz on Sandy Bridge with the TZ68A+. This has been resolved with the TZ68K+ and these boards will push 5GHz+.
VRMs on both boards are very high quality, no incidences of exploding VRM MOSFETs which MSI is extremely famous for.
Pros:
- Price (approximately in the range of Rs. 7600 for retail - yes this is the price in the INDIAN market, though this may have increased slightly because Indian rupee now is a bit weak compared to 2-3 months ago)
- Overclockability: You are NOT going to find a better board that sells at this price for this purpose.
- Features: Despite being a budget board, it packs Crossfire (X16+X4) support. There's USB 3.0 support.
- Full featured UEFI: very well done interface with only one niggle (VDROOP setting is backwards to that of any other motherboard).
- push buttons for power on, reset, etc. (nice to see in a board of this price)
- Energy saving without having to install any "EPU" software. The board even has status indicator LEDs that gradually brighten or dim depending on how many phases are in use and how much load is on each phase.
- Onboard graphics has HDMI port
- DDR3 1866/2200 support (just check out the other boards in this price range - you cannot expect this from an Intel or jetway board at this price)
- Supports Lucid Virtu and QuickSync
Cons
- Back panel: Two USB 2.0 and 2 USB 3.0 ports. It does have 3 front panel header connectors for USB 2.0 (6 ports at front panel)
- Only 6 SATA ports, two of which are SATA 6Gb/s
- Possible memory issues: The board does not have a memory auto tuner like Asus' MemOK. Though it played very nice with GSKILL's RipJaws DDR3 1600 and Corsair XMS3 modules, this may still be an issue (though, to be honest, I had less issues with memory on this board than my previous Asus!)
- Chipset heatsink too close to graphics card if you have a long length graphics card like the GeForce GTX 560 Ti
- DVI port for onboard graphics is NOT dual link (thus, only resolutions upto 1920x1080)
- Non-standard size: It's slightly smaller than ATX standard and the screw placement holes differ slightly. While the board fits well on my cabinet, I can see some others potentially having issues.
- Slow BIOS/UEFI updates - Biostar's BIOS support is just not as fast as Asus, MSI or Gigabyte.
- The amount of tweaking possible is a little daunting, the manual does not explain everything properly.
Build Quality
It's no Asus or Gigabyte and it looks much more conservative. However the board itself looks about as solid and well built as a lower end Asus board, which means.......not bad, not great either.
These are my impressions of the TZ68A+ using it for about two months now. I think it's a good alternative to get Sandy Bridge on the cheap, compared to say, something like the Intel DZ68DB (which doesn't even officially support DDR3 1600). On the other hand, a full featured deal from MSI at 9.4K is just as tempting (Z68A-GD55), which means it boils down to how much money you really want to spend.
Availability concerns
I agree that this board is not readily available. If you ask specifically for this board at lynx-india (by email), you will get it from them. There is a small chance you may get it from AnythinginIT.com as well. Send them an email specifically asking for this model. AFAIK the TZ68K+ is not available in India yet. However, it should be about the same price as the TZ68A+ (slightly higher) if it is available.
I was lucky enough to stumble upon this product, though I too had to wait a week for this board to arrive (Note: I didn't buy from lynx)