Chase Harper makes some quality stuff, no doubt about it. I had a set of their Aeropac bags for many years (bought them in 1990) and they held up quite well. They were red, which matched the Katana I had in 1990 but of course they looked ridiculous on my yellow TT so I sold them to a friend with a red VFR. I know that as of two months ago he was still using them.
Now I use a
RevPack Tour Pack, which works great on my TT. The bag is effing huge and only costs about $95. Here's a pic:
RevPack is another high-quality manufacturer, they are just lesser known. I have a RevPack tank bag that is eight years old now and still in great condition.
-KeithU