Be VERY careful on Cherry Creek over the years they have added a bunch of very low bridges. You will find very little time to get out in advance, and many could be fatal.
The South Platte has 14.5 miles of manmade whitewater, with one normal portage (not three) at the Zuni Power Plant (Up stream of Mile High). It's a great family run at medium levels (>1000 cfs) at higher levels 3000-9000 cfs it's a blast for advanced paddlers. The closer you get to C470 the easier the drops. There is one good size drop at the put-in near C470 and Santa Fe, you can put in right below it if you choose.
Union Ave Park has seven drops in close range, Confluence Park has another tight grouping of drops, and there are more drops below the skate park that are fun as well. The rest of the river the drops are spaced further apart.
Check the flows before you go. They are not releasing water this time of year from Chattfield Res. and all the rain water you're seeing may or may not be there when you choose a sunny day to go. So, if you want to hit the high water you may need to do so in the rain.
Look out for low hanging wires below the skate park, some of the local gate paddlers hang wires to practice on, and they don't always keep up with the up keep. It is quite common for them to be dragging in the current at high water.
I love to dance, but who needs the music- It throws me off.