The Series S is very frequently on sale for $50 off, sometimes more, and often comes with a bundled controller or game.
The Deck is only playable in Act 1. The frame rate in other acts struggles to reach 20 FPS, even on low settings. Also, the $400 deck you’re referencing cannot even install the game unless you buy an accompanying microSD (which I can’t imagine provides a good BG3 experience) or an SSD which you then crack open the steam deck to install (which will be too intimidating to most casual, non-tech people).
$450+ is a more accurate price point for playing BG3 on Steam Deck; 50% more than the Xbox MSRP, which is significantly discounted every few weeks. The Xbox will also offer a much more convenient experience to those who want to play the game on their TVs, and the game will look nicer on that hardware.
The Deck is an awesome little device, but you’re overselling it here, and ignoring a lot of nuance.
+1,000 for Requiem. I adored the first game, and Requiem instantly jumped into my top 5 favorite games of all time. Such a tense, beautiful, well-written experience.
Remnant 1 was great, but Remnant 2 was"designed with upscaling in mind", which translates to “we couldn’t be bothered to optimize anything”, so even a cutting edge gaming system can’t hold a consistent 60fps without upscaling enabled. Something to be aware of.
At most you’re gonna get like $10-15 off on most 1st-part titles. Better off going physical and buying used, if you want to save money.
As for games, Fire Emblem: Three Houses and Luigi’s Mansion 3 are great. Link’s Awakening, also. Breath of the Wild and Tears of the Kingdom are good too, but overrated imo.