I have used Penrite for years too, and it has always been good! As has been pointed out above though, I'm sure brand is fairly unimportant if you buy a known good quality brand.

I second that filters are really important and can certainly stuff engines in a hurry. Even Rycos can be problematic... I have run them on my 1200 for the past 9 years and never had a problem, but on both my BMW 323i and my mother inlaw's Hyundai Excel they have been junk! The BMW showed oil pressure problems immediately, so I swapped it back to a factory one and have used factory filters ever since (no harm done as the engine was only run for a short period of time - also, believe it or not, a BMW factory oil filter from the dealer costs $12 - cheaper than the Ryco!). My mother inlaw's Hyundai (Alpha 2 engine) was another story though with the motor developing noisy lifters after using one for 10000km. Turns out that there is a Honda filter that will screw onto the Alpha engine, but the anti-drainback valve pressure is wrong and causes the cams and lifters to be starved of oil. Many aftermarket manufacturers didn't bother developing a filter specifically for the Hyundai engine and just added Hyundai to the fitment list on the back of the filter they developed for the Honda engine. I haven't had a look under the rocker cover of the Hyundai, but I shudder to think what the cams are looking like under there. The engine is still going fine for now with a Hyundai filter (and a tap tap tap in the top end).

The oil pressure problems in the BMW are also anti-drainback valve related.