Grab a 35mm T-Serv and pump it up to 90 psi and I can take that corner no problemo. Kinda defeats the purpose of running wide tires a bit and it sounds like your riding style isn't really suited to running wide tires anyways. If one were to run 35mm tires on a regular basis, I'd suggest a 23mm rim so that one could run at a slightly lower pressure for more comfort. My statement about running 38mm tires with enough inflation on 19mm rims was merely to prove a point, that being that jumping up to a 28 is no problem at all. So anyways back to the actual subject at hand, which is running 25-28mm tires, yes it may look odd but 28s don't really roll over in the turns on 19mm rims until you get the air pressure dangerously low.

I can imagine Panaracers being pricey over there. Over here the Ultra Sport is typically 50% more expensive than a 26mm Stradius Sport. I often peruse the UK online shops and as a general rule they have killer deals on all the European stuff, but kinda high prices on all the Asian and North American stuff compared to what we find in the states. Jenson USA sells the 26mm Stradius Sport for 12.55 pounds sterling. Shipping would likely kill the deal.

So yeah, you might want to stick to European tire makers. Dunno if any of them make some 26s. I will tell you that not all 25s run the same. Michelin Dynamic 25s are much wider than Forte Strada 25s, for instance. The Michelins are nice and cheap, but ride kinda crappy. Vittoria Zaffiros are generally a little cheaper (at least over here) but ride better than the Dynamics, IME.

Wider tires run at the same pressure are less likely to pinch flat on you and give you the option of running slightly softer tires for comfort. Most important thing to do after pinch flatting is to make sure your tires are adequately inflated at the beginning of each ride.