Hi Cerberus, here are the common options for headlight replacement/upgrade. If cost and ease are your main concerns, I would recommend a halogen replacement bulb for now, and save or ask Santa, or make a birthday wish for a JNS in the future. I've heard good things about the Osram, and you can get two for the price of one Silverstar Ultras. Here is an Amazon link... https://amzn.to/2SkHYbA
Halogen replacement bulbs... Sylvania Silverstar & Silverstar Ultra, Osram Night Breaker, and Philips X-treme Vision, etc.
Pros: Cheapest improved lighting option; direct swap makes it easy to change/install
Cons: May be brighter than OEM, but often at the cost of lifespan (more heat & thiner filaments); higher watt usage than LED
LED bulb replacement
Pros: often offers brighter and whiter light than OEM or halogen; lower watt consumption making it good for freeing up that power for other accessories
Cons: higher priced than halogen replacement bulbs, many options quality/price mean "good" ones can cost a lot; more difficult to install due to heat sink, fan, and power module; often throw a different beam pattern than the OEM halogen depending on brand (this can be good or bad)
JNS headlight replacement
Pros: engineered as a direct headlight replacement for the TW, easy plug and play (unless you want to wire in the optional DRL); brighter and whiter light than OEM, while using lower wattage
Cons: $120 retail.
Here is tdubskid installing a LED on his TW200 so you can see what is involved. For what it's worth, this was 2 years ago, and I'm sure I've heard him mention he will be installing the JNS soon.
JNS TW200 quick install video...
JNS video best showing the difference between it and OEM output...