Proglides are expensive, here in Italy they comes at € 14.50 (4-pack) but they last me 120 shaves at least. If you shave every other day (you don't need daily shaves with the Proglide) they can last up to 8 months.
Quattro Titaniums comes at € 6.50 and Mach3s € 7 (4-packs) and they are good for 80 shaves.
Clogging is a non-issue. The trick is a well hydrated lather (yogurt-like), short strokes and frequent rinses.
I certainly wasn't getting that many shaves out of mine! (I'm pretty sure I was using Proglides) I'm sure there was room for improvement in my technique, however it was enough to send me looking for alternatives, and I found DE razors which I've been happy with so far.