Not sure of the models so don't know if you're telling me your thinking of Freesat but all I can say is I have it and I'm very satisfied.
Dave, FIVE US apart, the lineup is very similar to Freeview and hopefully those channels will join eventually.
When I first got Freesat I left my analogue aerial up just in case of picture breakup so I had analogue to fall back on. I can get limited Freeview but the signal is poor so breakup often occurs. However, despite this terrible winter of driving snow and heavy rain, I've never once had any picture breakup on Freesat. In fact so reliable has my Freesat signal been, that I'm now considering taking my aerials down entirely and leaving just a dish on my house. I do have an 85cm dish though, not the standard dish as I had in mind maybe a multisat set up later and also headroom for bad weather resistance. However, posts I've seen generally seem positive from smaller dishes. If in doubt though go big!
I've also heard of Freeview being of better picture quality than Freesat, and I even thought this myself having seen both sperately. However, when the World Darts was on from lakeside a month or two ago I had the same transmission on BBC 2 Freeview and BBC 2 Freesat. Much to my surprise flicking my tv between the 2, I found that the Freesat picture was both sharper and much more saturated. Another person in my household independantly said the same, so on that occassion at least, Freesat was the better SD picture. Whether thats always the case I couldn't comment.
BTW, I have the Humax HDR PVR in case you're wondering and I'm delighted with it.