I say absolutely yes, if you are seriously interested and want to stay with guitar, if you can afford it, you should buy a good guitar.
Here are my questions which support my answer: Are YOU worth having the good guitar? Not, is the guitar worth it. Do you deserve it? How old are you? What are you waiting for? How long will you live?
Here is my analysis of buying a Martin guitar. I have studied the market and enjoy studying the guitars. I am letting the cat out of the bag here with some steps that will result in some real serious dollar savings, and getting a better guitar, and getting the best guitar model for YOU.
Now as to WHICH guitar to buy, that is worth some analysis and shopping. What woods - rosewood or mahogany? Nut width? 12 or 14 fret length? Body shape and size? New or used?
My opinion is that if you buy a new Martin "right", barring complete economic meltdown you will not lose money. The price will be about the same for a year, then it will begin to appreciate due to rising prices. And, Martin guitars will always have a demand.
Other lesser brands are harder to sell, don't hold their value as well, and just don't have the brand recognition. Exceptions may be Gallagher, Collings, Santa Cruz, etc which have their special market.
Here is a tip: Musicians Friend has good prices on Martin guitars. The regularly have sales where you get up to 15 percent off of a high dollar item with a maximum of $500 discount. Also, they do not charge sales tax or shipping. AND, if you call their "Private Reserve" department, they will negotiate on the price even further. AND, if you ask nicely, they will look at multiples of the same model and help you select one that sounds better than the others, or has nicer wood, or both.
With that in mind, I really like the D-35. It is a great guitar. However, Martin has a bunch of models out this year and last year, some of which are new models and some are variations of the standard models. Take a look at what is out there.
Have fun shopping and best wishes. M
M Oberholtzer