RE: old vs. new designs
The more current designs fly better in my opinion.
Starting at some current smaller planes there is the CA models Epsilon (see patternproz.com), and PlanesPlus.com has a 110 size I think. Both are reported to fly well and are similar in size to a Kaos for instance.
The Hydeaway and Prophecy are also good planes as are several other designs.
What you want to spend on the plane is probably a big part of picking the plane.