I’m not sure that the keychron reds or browns are a very good switch with which to determine preference, while the gateron milky yellows are both one of the most affordable switches on the market and routinely ranked as one of the best linears available. If the goal is to get a good prebuilt that is better than those available from the bigger companies, like Corsair/Razer/Logitech/etc, then the stock prebuilt V1 is the way to go. If the goal is to get a legitimate enthusiast-grade keyboard for a very, very good price, then I stand by my recommendation. Spend $70 or $80 (depending on knob version or not) on the DIY, $40 on keycaps, and $25 on switches for a total of $135 or $145 for very good entry-level custom enthusiast board vs $90 or $100 for the pre-built. For me, the better switches and keycaps are worth $45. There is a reason that keychron offers these self-branded “k-pro” switches on their less-expensive prebuilts but better switches from gateron on their higher-priced/“nicer” keyboards