Like others have said, primary should be the 430W. But let me throw a couple cautions and suggestions your direction.
1. It is very easy when your just starting out to become “equipment fixated.” Therefore do not scrimp on CFI/CFII instruction. Remember if you’ve got your head in the cockpit trying to setup equipment for some navigation purpose your not paying attention to what the aircraft is doing, where your going and whose around you.
2. Spend time learning how to operate your equipment on the ground before trying to fly. For your Garmin 430 there is a great UTUBE instructional video that I recommend you watch at least ten times and then continue to review it until you can almost repeat in your sleep it’s dialogue and switch movements. It’s called “Garmin GNS 430/530 Non WAAS Training.” While yours is a WAAS gps this video is still very appropriate.
3. There are some GRT sponsored tutorials by Jerry “Widget” Morris that are excellent for teaching you how to operate your GRT HXr system and give some excellent operating techniques. Those videos can be accessed at http://grtavionics.com/home/video-tutorials/
An acquaintance flew his airplane into the ground a while back because (several of us believe) he was fixated on setting up his new Avionics equipment in semi-instrument conditions for an approach to an alternate airfield. The equipment was recently installed. Being new and different from what he was use to (we think) contributed to fixation and inattention to the aircraft’s flight direction. The accident resulted in two fatalities. He was a 4,000 hour pilot so it can happen to anyone.
Know your equipment! Always have a backup plan and be ready for the unexpected. When things get tight is not the time to figure out “how to enter a change in flight plan, setup an approach, or operate a piece of equipment” in a manor you haven’t tried before, thoroughly practiced, and can implement with minimal equipment input. Safe pilots spend a lot of time studying and preparing themselves for the unexpected.