hmmm, ive had a solo for a while. it was ok, not great really. the s200 is a much better gun i feel.
also something else to consider is the bsa scorpion SE. although currently only available in multishot. there is a couple of decent ss adaptors for it.
it has put some very impresssive figures over the chrono. its certainly a genuine competitor to the s400s
its also very light and ambi stocked.
having said that the solo can be picked up really quite cheaply now.