Have heard a lot about Asics gel-resolution 4 but never tried them.
I play in Asics Gel indoor trainers and they are very comfortable, they cost £60 and they're actually running shoes but they're very good. Barely a mark on them ! made a big mistake of buying some Mountain Warehouse Lockton Waterproofs. Outdoor shoes built for going on rocks I think but there quite bulky and much harder to move freely in. I still managed to win two short sets of singles in them thought. They where a little over half the price of the Asics .