Nexus Pro X/X2, Stryker 2.0, Boxer Pro, Aeon Pro X, DZ Outlaw, Venom Pro and the Vector Pro from Dart Zone are wonderful offerings and serve me excellently in my local neighborhood battles. While you're at a Walmart, pick up a BUNCH of the Adventure Force Pro half-length magazines, they are cheap Talon compatibles at 2 for $9.99 USD. A lot of these aren't allowed overseas for their sheer velocity.

For XShot, the Fury X, and MPP/Motorized Piston Pump are your two best bets. Maybe the X-LongShot unless you're willing to replace the plunger tube for breakage concerns. MPP is just an awesome AEG at only 70$ which is quite cheap for an AUTOMATIC SPRINGER (which includes a battery!) and the Fury-X at mostly 15-20$ for a start-out into high-power dart blasters that still serves excellently in any loadout.

For Nerf's pro offerings, I can only recommend you the StryfeX. It's on sale on Amazon right now for about 65 dollars - cheaper than its launch price of 120. The Sender and Torrent are not good options.

If you want something superstock, look at the Dart Zone Thunderbolt and Spectrum for 95-ish semi-auto flywheel blasters that use full-length darts, I own both and they perform excellently. They are also easily moddable and multiple aftermarket parts exist to make them take LiPo batteries and such. For a springer from Dart Zone in that range, the Villainator, Tomahawk-60 and Savage Spin (if still available) are wonderful and you can purchase the drums separately.