The Elite RIO Perception is an easy casting, general purpose fly line that casts nymphs, dry flies, streamers and soft hackles with ease. The short head makes this a particularly good line on smaller rivers and lakes when long distance line control is not necessary.
This line is built with RIO's low-stretch ConnectCore Plus, resulting in exceptionally smooth, durable fly lines, with the added benefits of incredible levels of sensitivity when casting and fishing, and providing enhanced detection of takes, faster hook sets, and far greater control when playing a fish. In addition, this line is built with SlickCast, RIO's proprietary coating technology, creating the slickest, most durable fly lines on the market. Lab tests show that lines built with SlickCast have the least amount of friction ever measured in a fly line.
The RIO Perception is the best all-around fly line on smaller rivers and lakes
Performs pretty well with most disciplines, in particular when throwing smaller stuff but it struggles a little bit to turn over wind resistant flies so I wouldn't really call it an "all around line" necessarily. It definitely does really well with the delicate small stuff but I think the SA MPX is a better choice for something all around.
I recently bought a 4wt rod and I had heard good things about Rio Gold. I couldn't be more pleased. I had been using the line that came with an Orvis package on my 6wt and I knew it was time for an upgrade when putting the 4wt outfit together. The Rio Gold improved my casting right away, the weight forward taper is just right, not too heavy, not too light. Hard to go wrong with Rio!