I've been a fly fisherman for 30+ years. A comparison you can make between fly fishing and pipes is that you can spend a little, you can spend a lot, largely at your discretion. Some caveats for yez:
You need to match your equipment to what you'll use it for. I use a #5 wght line with an 8'6' rod for most of my stream fishing. For the salt, I use #8, 9', and for small streams a #4, 7'6". I also sometimes use my old fiberglas rods, and enjoy doing my Rip Van Winkle imitation when some know it all sez I oughta try the new graphite sticks
Honestly, some anglers have no sense of humor.
Your choice is affected by where you live. I've found Eastern anglers who ply smaller streams prefer a moderate action rod. Western anglers for whom distance casting may be called for may prefer something faster.
Many fly fisherman love fast-action rods, but I cordially admit to hating them. I like moderate action rods, because I still cast mostly by feel, mostly with double taper lines which I learned on fiberglas rods. My preference is not based on "better than," it's just what I prefer. A fast action rod encourages a spinning rod type of casting stroke. A moderate action rod gives an action that looks more like what you see in A River Runs Through It. But really, it's up to the user's temperament.
More expensive doesn't mean better. There's a sweet spot in any manufacturer's lineup at which you're buying a perfectly satisfactory rod, one that hasn't been made to the cheapest possible price, buut you're not paying a premium for hi-tech materials, hand craftmanship etc. I like the value choice in rods. I own St Croix, Orvis and L.L. Bean sticks.
A fly fishing anecdote: Sage is a well known manuf of high-quality rods and, for quite a while, went overboard on fast action sticks. At least, they were way too stiff for my taste, and it was easy to spot a Sage owner by his/her frenetic casting stroke. Under load, the rod stopped bending just below the first guide, it seemed.
Sage then introduced a line advertised as "made for today's fast action rods." The reason was that the avg fly caster couldn't get enough speed going to flex a Sage rod using standard lines. Other line manufacturers followed suit. The little secret was this -- the new lines were manufactured to be half a weight heavier than the rod called for. So the line for a #5 rod was actually a #5.5. Old timers knew that the way to calm down a stiff rod was to "overline" -- i.e., use a #5 line on your #4 rod, for example.
Sage now offers a wider selection of actions, so anglers can find something in the lineup that matches their preferred casting stroke.