I see what you are saying. I have a human hair wig that looked great until I washed it. It has been sitting around waiting to be styled for about five months. Who, me? Lazy much?
The human hair wigs can also be dyed, giving options to change colors, just not as easily as changing wigs.
The ones I really like are a mix of human hair and synthetic. The synth hair holds its curl through a wash, which is nice. I can change the style a bit if I use low heat. I have added curls or swept the bangs a bit so they weren't in my eyes.
The length is the biggest difference from what I have. Winter = long and curls. Summer = shorter and straight. I have naturally curly hair, so I must smooth it out to match the straight hair topper.
I usually get my new hair in September, (the VA covers one per year), so I'll be checking in with my stylist soonish and looking through the new Raquel Welch catalogs.