The Martin Viper is a reflexed/deflexed R/D style of longbow, which is actually a flatbow and is close to the recurve in performance and they are asking a whole bunch of simolians for that bow. Probably because it's a very popular design. As far as being a good starter bow.... That depends on you and how much effort you put into it, but like I stated, it is a lot of money and if you've got it to spend, go for it. However, if you want the best bow for your money, look around first.
I feel that there are better bows on the market that are the same, or even less money than a Martin. In all fairness to the Martin product, I've never handled or shot the Viper, so I can't comment one way or the other as to how fine a bow it might be, or might not be. However, I've shot Martin bows for a lot of years and even own one, a Hunter recurve and they have a tendency to stack weight and can have considerable handshock, which can be gotten used to, but for a beginner shooter, I would recommend a smooth shooter so you aren't battling anything when you learn to shoot. Their bows have a tendency to be fast too, but fast isn't as important as accuracy.
The one bow that I have owned and enjoyed very much was the Chek-Mate (Canadian made) Crusader take down longbow. The smoothest, most forgiving bow that I've shot, ever and there was zero noticeable handshock. Oh, it was fast too for a 55# longbow and very accurate in my hands. Got rid of it and several other bows because I damaged my shoulder lifting and couldn't shoot them anymore. Now that I'm on the mend and can almost afford it, I'll be getting another Crusader take down.