Bug ... I can only tell you what I have & use :
Two 4rod rod holders by Hi-tek Stuff. (Elite Series) I added the black knobs to make adjustments w/o needing a wrench.
One 14' BnM Pro Staff Trolling rod
Two 14' BnM Capps/Coleman Spider Rig rods
Now the disclaimer : I don't "Spider Rig", I "Push" jigs/cranks with my setup.
The Capps/Coleman rods are a bit more limber tipped than the PST rod ... and would therefore show a lighter bite more easily.
If you want the best price ... keep your eye on the Personal Classifieds Forum !! I see sets of rods for sale on there quite often, and rod holders, too. (I actually bought my two sets of Hi-Tek rod holders from there) And you "could" post a WTB (want to buy) on the Personal Classifieds, stating what you're looking for & a price range, if you don't see anything of interest currently on there (& after you decide on brand/style of rod holder and brand/length of rods).
Now, I have fished in other peoples boats that had rod holders with the large U shaped cradle prongs ... and I didn't care much for them, because they would poke my wrists whenever I grabbed my rod (in front of the reel) out of the holder when getting a bite. And if they had the nut end of the screw coming up under the rod handle ... I'd get scraped by the bolt if I tried to grab the rod by the handle (behind the reel). With the low profile of the Hi-Tek holder cradle, I don't even think about where I grab the rod.
If I was going to be Spider Rigging, Pushing, AND Long Line trolling with the same set of rod holders .... I would prefer the Extreme Series Hi-Teks, just for the deeper U of the cradle.
Also of note: if you measure your boat seat distance from where you're mounting the rod holders & find that the 18" riser post is not as tall as you'd like, but you still like the Hi-Tek style holders ... then you might consider looking at Cumberland Crappie 360 rod holders. They have the same style rod holders as the Hi-Tek holders, but the T-bar riser post is height adjustable. Cumberland Crappie also has two other styles of rod holders ... one with a V shaped cradle (Cumberland model) and one with the U shaped cradle (Green River model).