Well I get my tires at either sales or places either going out of business or close outs. I don't care who makes it however I do have standards that must be met.
I have 4 bikes that I ride all the time, off and on with each, so I have to look for deals.
In most cases I have to replace at least 2 sets in a summer, whether it's front and rear or multi rear tires.
One thing I will say about the Dunlap tires they may not last as long as some but they are one of the safest tires I have used. Almost all my deals I get are Dunlap.
You do have to pay close attention to the tire pressure though.
I have never had a problem with then in the rain unless it needed replacing. I change mine as soon as I see it down to the wear mark. I keep tires in the shop always. Of course a lot of friends use the shop for storage to.

 

not happy with stock dunlops, switched to shinko on the sportster I used to have and loved them. Still stock dunlops on my rk but switching to shinko when these are done

 

Good thread is the key? I have used Cobra, eliteIII , commander, commander II, D402, Night Dragons all in rain and they do good but when the tire gets win, it doesn't matter what brand , it sucks in water without thread.
I currently have stock D402 and took a trip to Canada on them and they worked good after not using them since the bike was new 8 years and 85000 miles ago, that was about 12 sets of tires ago. I was pretty impressed.

 

Good tires are comprised of those with the correct pressure in them and tread that is above the wear indicator. It is my experience it really doesn't matter what brand you are using when it first starts to rain, especially if its the first rain after a long dry spell, one must be very careful, the oils from all those tires before yours hit the road start to float and man does it get slippery. Once the roads get soaked for a while most of the oils float off into the gutter. I have had good luck with the stock Dunlop's for both life duration and grip on the roads.

 

I have found the Michelin Commander II to be a great tire in rain. Have run stock Dunlops, Metz and the Michelin.

 

I use the Michelin Commander IIs also. Only been in the rain with them once and I couldn't tell much difference from running on dry pavement