I have seen the UltraSheild seats and they are very nice. Joe T at DCW sells them at a racer discount.
I was going to get one,, but due to my size and needing heavier/stronger and custom sized,, I decided to have a custom seat made by ISP since they are local and I felt better about them measuring me and building the seat rather than me filling out a custom seat order form and mailing in.
ISP, Butler, UltraSheild, Kirkey (the high end containment, not economy) any of these "full containment" seats would be OK,,,,the key would be what is best for your application and proper mounting.
Good luck on finishing the project soon.
Charles