Pro Tools wont even run on 2GHz Duo iMac!!!
Pro Tools blows... Honestly... If you are slow, and need to open & save PT sessions ( and can't just drag in AIFF files & MIDI data ) *maybe* PT LE would suck less...
But PT LE ONLY starts when Hardware is connected, so editing on a bus... no go.... draconian, BS!
LE is buggy, old, lame.... crashes a LOT! Far as I know, Intel version may come "Soon", but today, no choice..... PT has no x86 OS X version.
Electronic music? Yeah, reason, Live, etc. PT's is soo long in the tooth.... Maybe they'll clean it up soon... Also, PT plug ins cost more, TDM plugs use MOT DSP chips 24 bit integers - which isn't really a good way to do it.... it dithers, rounds, every time you use a plug in twice....
IN GB, Logic, Cubase, etc. they use the 32 bit floats ( yep up to 10,000KHz resolution! ) and waits until the last stage to round #'s longer than 32 places.... once.
TDM can't handle the track counts, or number of plugs, 32 bit floats Core Audio/ Audio Units do... VST's, etc. Then, like Mac OS 9 - 1/2 of PT is emulated 68K code.... also cant play back 100 tracks on a PB G4 ( or use 77 reverbs on a Macbook Pro )
Pro tools is a LOT of hype, a lot.... they give every pro free versions, and claim it's cause they are best... but I know no one who will use it now.... years ago, it did audio OK, now it's like a virus..... what a hack...
If you need software for iMac Core Duo - GB & Logic are the only ones available so far.... all plugs, apps, etc. are coming.... but not done yet....
GB uses Logic architecture, so whatever UI you prefer.... both open GB/Logic Logic/GB in each other - should be fine.....
As for PT, Digidesign, they lose money every year..... Pro Tools 4 and PT 5, 6, 7.... no changes.... it's good 1996 technology..... for a company losing cash for a decade..... AVID Video is dying also.... since software can do all that without paying 100,000 dollars....
Anyway, good luck on the bleeding edge,
LT