It depends would you want BT in the long run?! Yes its pretty expensive separately, so you can buy the Basic E6 model and spend an additional Rs1,900 for the 2GB card. BT is outstanding while you're still, say sitting, driving, riding and so forth.. But forget about it if you're moving as in walking,exercising... it tends to lose connectivity frequently to the phone. One more thing to consider is it has to be charge 4-5 hours for a full charge. A good quality headphone will go a long way me thinks.
And while I'm at it, here are a few fun things I did with E6.
DOS , Turbo C , Windows , Solitaire , Explorer
lol
And changed the skin to a Slax, so its a complete Linux phone.
PowerON , PowerOFF , Desktop
Here's a video of the same
Keep Modding
EDIT: Images are very grainy and blur, but you get the point, apologies.