I'd suggest this - stay at Reading for a half hour or so and see what you see. Then jump on a Basingstoke service (Either Cross Country or GW), it only takes 20 minutes or so. Once at Basingstoke, you'll see a whole lot of other stuff including... your Freight services crossing over the SWML en route to/from Southampton. Then once you've seen one, jump back on a Reading train and jobsagoodun.
B'stoke station has loads of services too - coffee, restaurants, WHSmith, etc.... much better choice than Reading West.