If you find that you like the performance of the BVC coil, but don't want to pony up $30 +/- per tank, Aspire also makes 6 or 8 other cheaper tanks that use the BVC's.
You can find the K1 for about $10- $12 and I've seen the CE-5 BVC for as little as $5... with several other tanks in between, in the $7 to $9 range.
I do enjoy lung hits to be honest, so im enjoying the bigger holes now, its good. also, this question has been asked im sure, but could u in simple terms explain difference between BVC and BDC? right now i do have 2 other tanks that are Aspire ET-S clearomizer, im sure they are BDC. i cant post the link but if you google Aspire ET-S clearomizer you'll see it. those are in the 9-10 dollar range like you mentioned, im thinking to get an adapter and use those? is that fine? or it has to be BVC? can i change their coil to BVC ? lol