dboxSamples has released Radio Chart Slayers for Sylenth1, which contains 128 presets: 20 basses, 34 leads, 18 synths, 20 plucks, 18 pads, 8 perc, 3 hat seq and 7 fx inspired by UK radio club tracks.
Price: £13.90 via download. Sylenth1 v2.21 or higher is required.
https://soundcloud.com/dboxsamples/sp02-radio-chart-slayers-demo