I don't really know which clippers you are referring to, but here's how I looked at it when I was first deciding what to do about grooming at home vs. the professionals. I thought I would buy a decent inexpensive pair rather than laying a ton of money on the table and finding I can't or hate clipping my own pup. I bought an Andis set from Petsmart for about $50, and figured, I'll give it a shot once and its like the money I would have spend on that trip to the groomer I spent on the clippers, so if I hated it, it wasn't any more money spent then if I had paid $50 for a bad cut. Turns out the clippers worked great, (I liked how they were more compact than other trimmers for my 4.9 lb furball) and now I only take her in to be professionally groomed once or twice a year for a special occasion. I don't even have any plans on upgrading or such, since this one meets all my needs.
One thing that was recommended to me that I will pass on if you are new to clipping is to find a cordless model. This way you have one less thing to wrangle as you trim your pup.
Here's a link to the one I picked up:
Andis Power Trim Cordless Rechargeable Trimmer D-4 - Grooming - Dog - PetSmart
Good luck, and let us know how it goes!