Johnnynoony,
I would hold up on the minoxidil for now. One thing that you should know is that even those who use hairloss treatments will still inevitably face continued hairloss, albeit a good treatment regime can delay the process 5 to 10 years if you respond well. Basically, you'll still have the same hairloss curve, but it will be shifted back 5 to 10 years, so the hairline you inevitably would have had at age 40 might be pushed back to age 50, if you are good with your regimen discipline.
In your case, slight recession is expected at your age (mine as well, I am 36), so I would concentrate more on something that is more of a long term measure. Instead of Minoxidil (Rogaine), I would actually suggest that you consider Finasteride (Propecia) and hold off on the minoxidil until you reach a point where your hairline is really approaching a point close to the verge of serious cosmetic unacceptability. Since minoxidil works best on hair that is recently lost, save it for that time when, to use baseball analogy, you need to "bring in the stopper".
Also, keep in mind that hairloss does not occur in a straight line progression. You will have a few years of loss, then it will maintain for 5 years or so, then you'll have another episode of loss, etc, etc. So, just because you have lost SOME hair does not mean that you will be Dick Cheney by Christmas.
Finasteride is GREAT at keeping, and strengthening what you already got, AND might provide some regrowth in areas that are thin. I would also pick up some Nizoral shampoo at the grocery store, and use it 2-3 times a week. In addition to fighting scalp irritation that exacerbates the male pattern baldness cycle, it also just happens to be a mild topical anti-androgen that, in studies, provides chances for regrowth equivalent to 2% minoxidil, but WITHOUT the twice daily need to "drip the grease drops" onto the scalp as is required with Minoxidil usage.
Third, I would pick up a copper peptide spray. The best two are Folligen and Tricomin, scan this forum and you'll find plenty written about the pros and cons of both, and spray this into your scalp whenever you can. Copper Peptides alleviate cellular-level damage that the male pattern baldness-causing DHT chemical does to follicles that makes them miniaturize.
And that, my friend, would be my suggested regimen for you. Finasteride, Nizoral shampoo 2-3 times a week, and a good copper peptide spray.
In addition to that, there are two other issues that I think are crucial elements in a good hairloss regimen, and you should address both. First, you need to examine the level of stress in your life, and if you live a stressful life, develop some strategies for dealing with it and developing a mentality of hardiness. Second, you are what you eat. Your hair is a reflection of your nutrition. If you are serious at all about fighting hairloss, you need to start paying attention to your nutrition if you aren't already.
Good luck, my friend.