Make The Move? Options

[the_future]

I am new to the world of Macs and music, and I'm looking for some advice. I currnetly have a decent sized home studio that I have been assembling for the last few years, and I have been using an Atari (yeah... I know) for all my midi sequencing, but I really want to make the move to Mac. I have alot of midi gear, and I need some help finding a decent system for what I will be doing. I have an older performa 6400 running os 9.1 with a Sonnet G3 processor upgrade that I use as my internet connection. I really don't want to put this in my studio, due to ram issues, so I'm looking to maybe buy a beige G3. (I'm a poor musician, so I don't want to spend a whole lot of money to get started) I have a Motu MTPII serial interface, but no software other than ProTools free
;)
do any of you out there have any tips that could help me out?
I would definately appreciate any feedback that wil point me in the right direction.
thanks in advance,
Temple

you can e-mail me at cubedmusic@earthlink.net

[the_future]

I forgot to mention that the g3 has 512mb Ram and a 20 or so gig hd. I'm not really looking to do a whole lot of audio tracks, maybe a max of 6 or so... and that would really be pushing it. Most (if not all) of the stuff I do is heavy in Midi, so I would't feel too bad if I cant add alot of audio, but the occasional sampling, and vocal tracks will make life alot easier. Does this sound possible on a machine like that?

thanks in advance!
Temple