I've got Velo Orange PBP rims on my Bob Jackson, which are a narrower version of the Raid. They are very nice rims and a number of people have commented on them. I've been very happy with them. They should set you back about £35 each in the UK. The chap that runs the UK outlet is very helpful and I'd get their stuff again.
They are nice, but the H Plus Sons is superior for a couple of reasons
1) it's got double eyelets as opposed to single, this secures longer rim life against metal fatigue and cracking. Typically also means higher tensions can be used safely, resulting ina more durable wheel.
2) The H+S is a wider rim, which provides a rounder tyre profile, similar to a tubular. The net result is that it can be used at lower tyre pressure, typically 80-90 PSI for a 23 mm tyre and even lower for 25 or 27... the advantage of lower tyre pressure in a "race" like the Eroica goes without saying.
Bear in mind Tom Boonen only uses 60-65 PSI on his tubs for Paris-Roubaix