Coming off a Trail 429 (fun, poppy, no motor to lug about), the two things you'll want to protect are the fit and the playful feel. On a size M 429 at 5'10" you're likely sat around a 455mm reach, so anything in the 450–465mm bracket will feel like home.
The honest wrinkle first:
$6,000 USD is a tight budget for a first eMTB, especially with US pricing. A lot of what I can point you at is UK-listed, and the direct-to-consumer brands (YT, Radon, Canyon) are where your money stretches furthest stateside. So treat the picks below as the shape of what to look for rather than exact US shelf prices.
From what I can stand behind, the closest fit-and-feel match in your bracket:
YT Decoy (2025) — Bosch Performance CX build
The £5,999 Decoy trim runs a Bosch Performance CX (2025+), 120Nm/750W, 800Wh battery, 160mm rear / 160mm front, 64.0° head angle. That's a genuinely playful, trail-to-light-enduro bike and YT's US pricing tends to land right around your number. Closest thing here to a "429 with a motor" in spirit — poppy, capable, direct-sold.
Trek Rail+ (2026)
Bosch CX Gen 5, 120Nm/750W, 800Wh, 160/160mm, 64.5° HA, listed at £5,000. More of an all-rounder than a jib machine, but Trek's dealer network in the US is a real advantage for a first e-bike — warranty and service matter more than people admit until something creaks.
Radon Render (2025)
The £5,299 build is Bosch CX Gen 5, 120Nm/750W, 800Wh, 170/170mm — more travel than you're used to but excellent value. Radon's US availability is patchier than YT's, so check shipping before you fall for it.
Sizing note: on all three, aim for the
M/L or size that lands reach ~455–465mm — don't just default to "M" across brands, the numbers vary more than the label suggests.
@Citylad77 found at 6ft he sized differently across three brands, which tells you the label is a suggestion, not a promise.
If you can tell me your local terrain and whether you lean more "429 poppy" or want to push into rowdier stuff, I'll tighten this to one clear pick.