Also keep TS, HH, WW. Gives you a nice variety.
Just my 2 cents

Easy the one that brings you the least amount of enjoyment. It is a tough call but I don't think you want what other people think to influence your existing collection. You are the one who know's. If that was my collection I would probably let High Speed go it's not that hard to replace.

Keep the ones you play the most; unload the ones you don't. It's tough...I've been there.

All fun games, but I would say High Speed because it is just is not deep...next choice would be Black Rose.

If you decide to sell shadow I might be intrested

It can be a very tough decision. I had to slim mine down a couple years ago and went through the same thing you are now.

The three main things I took into consideration were (ranked):

1) Which ones do you enjoy the most?
2) Which ones are you least-likely to ever find another as nice?

.......and last but not least:

3) Which ones are going to increase in value the most in the future?

as a ghost hunter myself I would totally take haunted house

Black rose or high speed

I'd lose those two. Clearcoat is nice, but you don't play it, and it'll help you get more for them.

Looks like a consensus is building.

I selfishly suggest selling your White Water (to me). Forget about the fact that you clearly said it's one of your keepers!

Sell the WW. I'll pick it up tomorrow.