You can get a refurbished (new case, new battery, and factory warranty) Garmin Edge 800 for $170.

Other makers GPSes are worse for long rides on unfamiliar roads, with worse or non-existent

• Maps (buy a micro-SD card and download from openfietsmap.nl). The 800 maps have roads, street names, and can be panned when zoomed in so you see where roads go.
• Turn-by-turn navigation. The 800 switches to the map screen .1 miles before a turn, and can highlight the road in white.
• User specified data-points from .tcx files for things like food and water stops
• Routing to nearby Points Of Interest like bike shops for emergency repairs and public water sources if a stop is closed.

Garmin claims 15 hours of battery life; although I run mine off a dynamo hub and couldn't tell you what the actual life is. The mini USB power connector faces the rider so you can run it riding with a USB cable that won't fall out - I use a 90 degree cable on my K-Edge XL out-front mount. Unlike the older 500, it allows charging while riding with a standard USB cable.

The newer 810 sometimes crashes based on what's on the map, with roundabouts a common problem.

The 800 can crash on long rides, although splitting them up into smaller files and joining them later using fittools.com avoids that.

I tried an ELEMNT and returned it. The Bolt is smaller and costs less, but uses the same software.

While the software may now be past its teething pains, Wahoo made the wise business decision to rely on users' smart phones where they leverage software written by other people to do things like routing and mapping and I wouldn't want to rely on that with cellular internet access not 100% reliable and battery life poor.

You can't see cycling roads on the map without zooming in, and can't pan while zoomed in. Street names aren't included on maps so you can't recognize different parts of long roads you're familiar with. There's no routing in the ELEMNT.

Before the ELEMNT and 800 I used a Garmin Edge 500 with bread crumbs but no maps. I upgraded because I made too many wrong turns on long rides where multiple roads came together nearby and the street signs weren't readable, or I took a circuitous route getting to a food stop.

I also tried an 810 (newer garmins have Bluetooth which makes them more attractive), but had a software crash on my first ride and lost data within the first week.

The Edge Touring and Touring Plus are the 800 hardware with different firmware that omits things like support for a power meter.