I haven't seen the piece in question, but just in general I'd say three things on this particular subject.
First, collect for yourself and not for anybody else. Follow your own heart and your own tastes and collect the pieces that bring you pleasure and you can't really go wrong. There will always be people with deeper pockets, more display room, and a bigger collection. Don't try to compete, or impress anybody else, don't buy something just because of hype or popularity, stick to what speaks to who you are and where your passions lay. Anything else is just clutter.
Personally I'm not big on signed statues, but if you are, if it adds something special for you, go for it. That said, if you want to keep the option open of selling the piece at a later date, then you might want to stick to just getting the bases signed, and not anywhere on the statue proper. Also, just realise that if you get something personalised to you then you are probably going to face an uphill battle ever selling it. Some people like (appropriately matching) sig's, some don't, but almost no one is interested in buying something signed to somebody else's name. So if you get a piece signed to you then there's a very good chance you have detracted from the resale value, rather than added to it. Of course the location of said personalised signature, and how it was applied also play a part, as far as all that goes. Some signatures being easier to paint out or otherwise remove (partially or fully) than others, so some signatures will hurt resale harder than others.
Third, everyone has an opinion in this hobby. But that's all they are, so don't take them personally. The only person who needs to enjoy whatever you buy is you, and if you are honestly happy with a piece then it shouldn't matter whether almost everyone agrees with you, and sees in it what you yourself do, or if almost nobody does. After all a collection is supposed to reflect its owner, and their tastes and their personality, not anybody elses. So everything else, as far as views and opinions go, is mostly just interesting noise.
Just have fun, and do what's right for you, and again, you can't go far wrong. Along any other path lies madness (or burn out, at the very least).
My view, anyway, for what little it's worth.