Database Software

We have a .net app with a peak of maybe 6000 sessions. We currently use EE 11.1 running on RHEL5, with 32GB of memory. I've set up data guard for a standby, which I think makes more sense as cheap HA. But I'm a RAC newbie, so I'm biased :). My boss is considering going Oracle RAC, which is great. But of course (no surprise) its a bit expensive. He wants to trim the cluster down to two only nodes with just 1 processor each to keep the costs down. The servers would each have 36GB of memory. Also my boss wants to keep using SCSI disks; (8) 10k drives. I'm concerned that we're going to have issues.. Doing some research, it looks like dual processor systems would possibly be more stable, or maybe 3 single processor servers in the cluster? I keep hoping we'll get a small storage array, since that looks easier to config for ASM. I can't see wasting time to make a pig fly.. And I want this to work, since I'll get the calls. Can someone share what they know/use for a decent "small" RAC config? or is there a "don't do this" doc somewhere on the net to read?

Thanks,

E.