I think, and it's only my opinion that the price of secondhand woody stuff has increased significantly in the last 12 months probably coinciding with the economy getting rather healthier. I bought a lovely secondhand Record router in its original boxe with instructions and all three bits, fence and support arm for £25 almost exactly a year ago. A month later I found on eBay an unused Veritas router plane with two fences (goodness knows why they wanted two) for £45. I auctioned off the Record router for £30. Today, I would not be so fortunate.
Having used both planes, my preference is definitely for the Veritas which has two nice features.
1. There is a nice accurate cutting iron adjuster and a very good depth stop which IMO is far better than the Record system
2. The plane iron cutting head can be removed and placed in a jig for ease of sharpening which makes it very easy.
I never worked out what the fit / support arm was for and have never found a need for such a device. The Veritas is not supplied with such a device. (I'm sure someone will come along and explain what it's used for) Equally I find there are far better tools for cutting a plough groove and would not buy a fence.