a pair that fit you! remember dexter and dynothane offer wide sizes too, have your feet measured so you can select the right size when buying your shoes. Be surprised the difference well fitting shoes make to your bowling, reguardless of brand / price.
Dynothane ultras use kangaroo leather which is softer, but the downside is that it does wear out quicker if you have high impact areas on your shoes (say for instance you drag your foot at the line), otherwise they just use leather like most of the other mid-high range shoes, so they really arent anything super special.
What level is your game at? introducing shoes with a bunch of heel / slide combinations can actually have a negative effect depending on where you are at, if you dont have a need for changing the level of grip like that, dont let someone try to sell you on the idea.