d24's are cool if ya got the slots available and you can run 2 d24 cards for 64 tracks. the d24 is a good card. i have a d24, a mix i/o card (which is another d24 and can be had for 200 bucks) and 5 dsp farms. I am not sure but you may need at least one of the vintage dsp farms which are GREAT values at 200 bucks. you'll love the power of an expanded system cause you have RTAS still available. my Cape mix was mixed on a SINGLE d24 and dsp farm and though i had challenges with dsp.. it wasnt a problem and was more powerful than my LE system i had prior.