Best heating option/picture update trans pecos

[WrongPython]

That's a beautiful little snake, OP! You're in luck, because I'm actually using both and RHP (radiant heat panel) and Arcadia DHP (deep heat projector) right now.

RHPs give off mostly IR-C (AKA far infrared). They're great for raising ambients in larger enclosures, and if you place the appropriate surface underneath one (ie. a piece of slate, a shelf, etc.), said surface will absorb and reflect some heat back to create a belly-heat basking spot. IR-C only produces superficial and ambient heat, though, so RHPs should not be used as the sole heat source for species that need an intense basking spot (think lizards).

DHPs give off a mix of IR-B (AKA mid infrared) and IR-A (AKA near infrared), mostly IR-B. They're good for creating a focused, lightless basking spot that's more intense than those created by IR-C heat sources (ie. RHPs, heat mats, and the like). In a small, insulated enclosures, heat reflected by surfaces underneath them may be able to raise ambients by a few degrees (think 1-2 F above room temp). If you need a heat source to really raise ambients, though, you'll need to look elsewhere. Needless to say, this is a great choice for species/individuals that like more intense basking spots, particularly when paired with a UV-B light.

How big is the tank you plan on using? If your snake is a baby, anything but the smallest tank may be too big. In general, when receiving a new snake, it's best to emulate the housing conditions they had at their breeder's. That typically means a shoebox-sized (6 qt) tub with a heat mat.