RE: Pick for Chinese 26cc Engine?
The Brillelli 26SSR is a very good Chinese engine (Taiwan, so not really the same set of issues regarding QC).
RCIgnitions offers an excellent 29cc Chinese engine (basically a stroker 26cc) for $275 as well as the benchmark Zenoah G26. Both turn a Mejzlik 16x8 around 10k (no exhaust), and Mejzlik 18x6 at 9k rpm.