The two headphones you have are excellent mixing and mastering headphones.
Good muso. headphones are the HD 215 - closed back, affordable, have a rotatable earpiece for one-eared use and good at sound rejection.
I know a few studios that use these for tracking headphones.
At a higher price and good if you also want closed headphones for recording work are the HD 25-1 (these are what I use). But if you only need tracking headphones, the cheaper HD 215 are probably the best ones to get.
Of the ones I own and have seen used quite often ------
beyerdynamic dt-770pro ($200 or less) - Sound really great but fairly heavy on the bass, but for tracking who cares. **** Edit- isolation isn't as good as the hd280's if that's what you're looking for. I just try to keep the click at a relatively low level for vocalists and don't have any problems with those.
Sony mdr-7506 - ($100 or less) Great headphones for the price, sound good and are really comfortable to wear for a long time. Decent isolation.
Sennheiser hd280pro - ($100 or less) Sound really good, great isolation, although personally I find them really uncomfortable after long periods of time as they really stick to your dome. Still nice though.
So I can't say what the "best" headphones are for tracking, but those three are some really good, reasonably priced options.
+1 on the Beyerdynamic DT770's and the Sennheiser HD280's. I've used and like both, the former being a bit more comfortable and the latter have a slightly tighter seal. Many use and love the Ultrasones (for a bit more money) but it's hard to beat the HD280's for the money...
I have a few pairs of Sony 7506 and Sennhiesr HD280.
I like them both, but If I have to add another I would lean toward the Sennhiesr HD280.
They are good for tracking, no leakage thru the mics, comfortable, and they sound good.
+1 m50's i have a pair with my mackie monitors i use for all my tracking and late night mixes crnaking my guitar di to not piss the neighbors off and there not to far off if you must do some late night tracking or mixing also. break them in on a ipod for about 15hrs and they are golden. use them all the time with my sm7b-great river-apogee rosetta into logic. love love love em. b&h has a good price on them. i really want a second or third pair now!
Sony 7506. Bright enough to cut in a dense acoustic environment, with just enough low end to make the rhythm section sort of happy. Affordable, rugged, comfortable and enough of a standard that players are used to them.
If you really want to avoid bleed use some in-ear phones with good isolation.
I have Beyerdynamic DT770 and Sony 7506, but there is no way they can compete with my Etymotic ER-6 when it comes to sound isolation. The latter don't sound so good, though, but with some EQ added I am happy with them during recording. And the bleed into a vocal mic is close to the noisefloor. With the other two there is no way you can use the vocal track a capella, should you later decide to have a few bars without without backing in your song, the drums will bleed through.
Whereas in-ear is not as comfortable wearing as cans, at least during a hot day you won't sweat as much with them and get that awful sticky feeling around your ears.