Do these rocker arms look good or should I spend more ?

The last set wont work unless you have 7/16 studs instead of the standard 3/8. I've never heard anything good or bad about pro comp, but alot of bad stuff about CAT

Might look at these
http://cgi.ebay.com/ebaymotors/Ford...hZ019QQitemZ7996593934QQrdZ1QQsspagenameZWD1V

You can get the proforms from places like jegs for under $150 too

Even though I use eBay a lot, I am wary of buying rocker arms there. I was across the aisle from Scorpion at last year's PRI show, and the owner was telling me some pretty scary tales. He said almost all his returns were from knock-off Chinese rockers that people bought on eBay. He also told me about a prototype Chevy Gen III rocker he had on his display stand at PRI the year previous, and someone stole it off his display. 6 Months later, it was on eBay, in sets, even though he decided not to manufacture that part.

I would buy my rockers from a reputable manufacturer and a reputable source. The ones you are looking at are less than $150 at Jegs all day long.

with low rpm and low spring pressures, they should be fine.
i'm running some no-name used alum rockers with 400+ lbs over the nose, and they're fine so far.