Nah. Select can run on Omega. Not the other way around, for certain!
It's a sticky predicament to decide which way to go for a machine just now, certainly. My choice has been for VirtualAcorn on a fast PC. Emulation shows it's running at an effective 455Mhz here -- RISC OS starts and does all the Select boot in under 5 seconds, networking works flawlessly, get to use cheap and speedy PC peripherals, albeit in a vaguely clunky way (eg using the flashcard reader is a bit of hassle in setting up mounts and soforth). A fast machine really does justice to Select -- shame it's not on that XScale there.
If you want a true RISC OS machine, I'd still point at RiscPC or Iyonix -- certainly not the Omega as its history is too much of a mess to suggest it'll be supported (Anyone recall the Mico USB debacle? -- still ongoing afaik!) and without Networking support and the current unjustifiable blame that MD are placing on ROL for that, I think anyone would be mad to go for an Omega really -- the benefits over a RiscPC with ViewFinder are just not there. JGZimmerele care to explain exactly why Omega is worth it for his father, rather than a RiscPC ?