I think any 30'ish psi pump would be good, those look like some decent pumps.
I did have the Holley Blue on mine for a while that Bruce has, but finally paid
for the Weldon. With the Weldon it is one of the easiest starting airplane engines
I have ever used. Unless it's really cold out then it's jumper cable time ...
The Odyssey back in the tail just doesn't have enough umph for really cold weather.

That Aeromotive 340 looks like a good pump to use. If I didn't have the Weldon
I might look at that. The Holley makes it start easy, but I think you'd get about
only 1/2 throttle max if you lost the engine driven pump in flight, with it as
a backup (it's about 14 psi).

Regards,
Jeff