Real-world needs and realistic application need to be weighed against wants here. I stay very concerned when I hear of officers investing in "things" when other parts of life should be weighed in on. When you are a recruit you are behind a learning curve, I agree, but the equipment curve can be tolerated somewhat.
Decisions need to be made, so here are some of the questions you should ask yourself to determine how important any cool item actually is to you:
Will I use this widget in the normal course of my duties? In other words, with what frequency will I use this so desired item? If that is low, what is the criticality of it? Is it a life-saving implement such as a secondary weapon or quality utility knife? Is this a whim propelled by bigger gun or cooler widget envy?
Plan your budget. As you get higher in rank with more pay, then go after the handgun or what-have-you with all the bells and whistles.
When you do decide to purchase a new whatchamacallit, remember that proper practice makes perfect. You can't buy accuracy; there is still the need for human input.