For me it's a No at the moment. I have nice classic accelerators for my A1200 and A4000 , my A4000 has rtg already. and I'm not massively interested in turbo charging my A500 as I like it at stock.
I say "at the moment" because I haven't ruled out vampire, I think it looks like excellent hardware but I'd like to see which way it goes and also see what materialises for A1200 and A4000 first. I'm in no rush.