Most forgiving high end speaker 10k-20k?

Tannoy.

I second the silver line Bolero speaker. Simply perfect for you based on your comments. I owned them for some 2 years and loved them.

I would also suggest Nola Viper Reference speakers.

I recommend these a lot, but it's because they fit the bill yet again. The Legacy Focus 20/20's. They make bad recordings sound awesome(they are a warm relaxed speaker, yet deliver dynamics to be exciting)and make great recordings sound amazing. I've had them in 3 rooms. 1 large, 1 medium, 1 pretty small. They sounded great in each one. If you can listen to some Focus, I would bet you would enjoy them. The new models are around 7k

Also the 20/20's were amazing with any types of music (jazz, rock, classical, rap, etc)

Dali speakers are "forgiving" or "easy to listen to." TAS calls them speakers you can marry for life, and Michael Fremer gave them a good review in Stereophile. You can find the review on their website.

There are a couple pair of their "Euphonia" line MS5 for sale for $7,500 and $8,200 right now. This is their top of the line normal floorstander type. They could be what you're looking for.

I own their Helicon 400s, which is one step down from the Euphonia line and they do sound good.

I think relatively "frequency flat" speakers are the way to go, and among most good speakers one should appreciate accurate treble as an important part of the musical experience (tonal "cues"), and only bothersome if your system has something wrong with it. If you try to use a speaker as a harshness filter everything cool suffers. Try tubes (love 'em)...or let your ear hair grow out...but keep the crisp! Everything from rustling leaves to a mandolin needs it. Don't put gauze over your earglasses to mute the tawdry aural wrinkles or you'll miss all of grandma's character.