ofcourse u can spture wid external
i got a pinnacle pctv usb2 100e and u can capture perfectly with it
u can do everything wich u can do wid an internal
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internal ones r around rs.2000 a lil up n down....wid dem, u can c tv, record tv, wid sum u can hear n record FM
if dey got the supported ports, u can use them 2 record video from a camcorder or VCR and then after getting them onto ur pc, u can make vcds or dvds out of them
u can do all the same stuff wid external ones more...they dont need an external power source, its powered thru USB itself...i think u need to hav USB 2 for this...and its a lil more expensiv.
the best external one rite now is the pinnacle pctv usb2 100e...and that is around 5-6K....
both hav remotes wich perform a lot of functions
i would say u shud go for pinnacle tv tuners...dey got both internal n external
and the software they supply 2 view tv is quite good
a plus point for external is that if u got a laptop, or more than one computer, etc u can jus pik it up n connect to the other one
incase u wanna record something and ur 1st pc is full, u can attach 2 ur 2nd pc and record