Good old Budikai 3 is my favorite !
very well balanced fighting system
lots of battle strategies
good selection of characters
easy to learn
not too cheap as long as no one used the revival skills
The tenkai games seemed kinda complicated and very easy to be cheap in
Burst Limit (from what I can guess because I just read reviews and plyed the demo) has a great fighting system,graphics, and reliable story line, but stops at the end of the cell saga .... that's why I'm going to wait for Burst Limit 2 where I hope will be more exanded